阅读短文，回答问题。(20分)
There are many postcards from China. Look at this one. There are a lot of bicycles in China. People ride them to work. And there are a lot of beautiful lakes. This is the Dongting Lake.It is in Hunan. There is a very famous river，the Huanghe River.I like this postcard. There is a famous square in Beijing. It's Tian'anmen Square. And there's the Great Wall in China，too.It's about six thousand seven hundred kilometres long. Of course，there are also many mountains in China.There is a famous mountain in Shandong. Look！This is the Mount Tai.
（1）Where is the Dongting Lake?
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（2）Is Tian'anmen Square in Shanghai?
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（3）How long is the Great Wall?
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（4）Which mountain is famous in Shandong?
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